Lobenzo chase



2S.heets--Sheet1. L. CHAS E.

Air-Cumpressors or Blowers. NO. 141,762. Patented August12,1873.

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Air-Compressors or Blowers.

N0. I4T,762.

Patented August 12, 1873.

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AM. PHD TD'L was/Wm ca M x (mam/E's PROCESS r STATES Aruu'r rrronLORENZO CHASE, OE PORTLAND, MAINE, ASSIGNOR OF ONE-HALF HIS RIGHT TOCHARLES W. GAHOON, OF SAME PLACE.

IMPROVEMENT IN AIR CCMPRESSORS 0R BLOWERS.

Specification forming part of Letters Patent No. 141,762, dated August12, 1873; application filed July 18, 1873.

To all whom it may concern Be it known that I, LORENZO CHASE, ofPortland, in the county of Cumberland and in the State of Maine, haveinvented certain new and useful Improvements in Air Oompressors orBlowers; and do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings making a part of this specification, in which- Figure 1 is aperspective view of my improved apparatus, and Fig. 2 is a verticalcentral section of the same upon a line parallel to its front and rearsides.

Letters of like name and kind refer to like parts in each of thefigures.

The object of my invention is to thoroughly utilize steam for theproduction of an air-blast, by causing it to first expel air from achamber by its direct pressure, and afterward by condensation to createa vacuum and draw into said chamber a further supply of air, to whichend said invention consists, principally, in the combination of two ormore air-chambers, provided with suitable openings .and apparatus forthe automatic and alternate admission of steam and water, and for theadmission and emission of air, substantially as and for the purposehereinafter specified. It consists, further, in the construction andrelative arrangement of the air-chambers, air and steam ports, andwater-pipes, substantially as and for the purpose hereinafter shown. Itconsists, finally, in the apparatus, as a whole, when its several partsare constructed and combined to operate substantially as and for thepurpose hereinafter set forth.

In the annexed drawings, A and B represent two air-chambers constructed,preferably, of metal, with a square form in horizontal section, and aconical form in vertical section, which chambers are secured at theirlower open ends to or upon a suitable bed-plate, O, as shown. To theupper ends of the air-chambers, which are also open, is attached a pipe,D, that is divided into two parts by means of a partition, D, whichextends transversely across its interior at or near its longitudinalcenter. Upon each side of the partition D an opening, d, is provided inand through the upper side of the pipe D, which openings are covered bymeans of an ordinary steam slidevalve, E, while both valve and openingsare inclosed by a steam-chest, F, that is connected by means of a pipe,G, with a steam-boiler, said parts being so arranged as to enable steamto be alternately admitted to and excluded from each airchamber. At thetransverse center and lower end of each chamber A and B an opening, H,is provided in and through the bed-plate O, which opening is for theadmission of air to the interior, and is inclosed by means of aclack-valve, I, that opens inward. A second and smaller opening, K,provided in and through said base-plate, near the inner side of saidchamber, is inclosed upon its lower side by means of a valve, L, whichopens downward and permits the escape of air into a chamber orreservoir, M, that is placed directly beneath, from whence said airpasses through a pipe, m, to the point where it is to be employed. Thevalves I and L are each provided with a guard or check piece, I and L,respectively, which, while permitting them to open sufficiently to admitof the free passage of air, do not permit them to pass beyond suchpoints. If rubber is employed upon the faces of the valves it will benecessary to provide grated openings in order that said covering may notbe loosened and displaced. Extending along the upper side of the pipe Dis a smaller pipe, N, which terminates directly over the centers of thechambers A and B, and at each end is connected with a vertical pipe, 0,that extends downward through said pipes D into the upper end of one ofsaid chambers, and is provided at its lower open end with a flaringsprayingnozzle, 0. The pipe N is connected near its longitudinal centerwith a discharge-pipe, Q, of a steam-pump, B, by means of which a supplyof water is forced into the air-chambers. A cylindrical valve orstop-cock, n, is placed horizontally within each end of the pipe N, andits end provided with a dependent arm, a, which is connected with thecorresponding arm of the opposite cock by means of a bar, N, so thatalongitudinal movement of the latter shall cause both of said cocks toturn. The openings in and through the cooks n are relatively arranged sothat when the bar N is moved in one direction the cock upon its forwardend shall be opened to permit water to pass downward through the pipe 0into the air-chamber, and the opposite cock shall be simultaneouslyclosed, while upon an opposite movement of said bar the position of saidcocks will be reversed, and water admitted to the opposite chamber. Inorder that the water and steam valves may be caused to operateautomatically the steampump It is placed upon the bedplate C, and theupper end of its piston-rod S connected by means of a pitman, T, to orwith the horizontal arm of a bell-crank or rocker-arm, U, whichrocker-arm is pivoted upon one end of the pipe D in such position as tobring the upper end of its vertical arm upon a line with the rod E, foroperating the steam-valve E. A

connecting-rod, V, connects the rocker-arm U with said valve-rod,andcauses the vertical reciprocating movement of the piston-rod S to becommunicated to said valve. The bar N is now connected to or with thevalve-rod E, so as to cause the movements of the latter to becommunicated through said bar to the cocks at, and completes theapparatus, the operation of which is as follows:

Steam is admitted to the pump R and to the steam-chest F, and said pumpset in motion. By the motion of the valve E steam is admitted to one ofthe chambers B, and by its pressward and outward without contact withthe walls, so as not to unnecessarily cool the latter, while theincreased size of the lower ends of said chambers renders practicablethe employment of much larger valves than would otherwise be possible.

The apparatus thus constructed is simple, compact, and durable, andpossesses such efficiency as to render it capable of nearly twice theamount of effective service, by use of a given quantity of steam, thatis possible in apparatus where only the direct action of steam isemployed for producing a current of air.

Having thus fully set forth the nature and merits of my invention, whatI claim as new is- 1. The combination of two or more airchambers,provided with suitable openings and apparatus for the automatic andalternate admission of steam and water, and for the admission andemission of air, substantially as and for the purpose specified.

2. The construction and relative arrangement of the air-chambers A andB, air-ports H and K, steam-ports d, and water-pipes O and 0,substantially as and for the purpose shown.

3. The hereinbei'orc-described apparatus, as a whole, when its severalparts are constructed and combined to operate substantially as and forthe purpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand andseal this 16th day of J nly, 1873.

LORENZO CHASE.

Witnesses:

OHAs. W. Oanoon, JNO. T. CARROLL.

